umbonate

umbonate

[uhm-buh-nit, -neyt]
adjective
1.
having an umbo or projecting boss.
2.
shaped like an umbo; having a rounded convex form: an umbonate fungus.

Origin:
1820–30; < Latin umbōn- (stem of umbō; see umbo) + -ate1

subumbonate, adjective
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World English Dictionary
umbo (ˈʌmbəʊ)
 
n , pl umbones, umbos
1.  a small hump projecting from the centre of the cap in certain mushrooms
2.  a hooked prominence occurring at the apex of each half of the shell of a bivalve mollusc
3.  anatomy the slightly convex area at the centre of the outer surface of the eardrum, where the malleus is attached on the internal surface
4.  a large projecting central boss on a shield, esp on a Saxon shield
 
[C18: from Latin: boss of a shield, projecting piece]
 
umbonate
 
adj
 
umbonal
 
adj
 
umbonic
 
adj

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